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Finding the Fourth Proportional to 73,220.32, 109,705.09 and 39,963.72

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Solution

The fourth proportional to 73,220.32, 109,705.09 and 39,963.72 is: 59,877.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,220.32 : 109,705.09 = 39,963.72 : x
  2. Step 2: Convert to fraction form
    73,220.32/109,705.09 = 39,963.72/x
  3. Step 3: Cross multiply
    73,220.32x = 109,705.09 × 39,963.72
  4. Step 4: Simplify right side
    73,220.32x = 4,384,223,499.33
  5. Step 5: Solve for x
    x = 4,384,223,499.33/73,220.32
  6. Step 6: Final answer
    x = 59,877.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.